Kahl viktob



K. v. RUI JIN. STEP-BY-STEP MECHANISM 1N GALCULATlNG MACHINES.

APPLlCATlON FILED APR. 2. 1919.

PatentedSept. 7, 1920.

UNITED STATES PATENT OFFICE.

KARL VIKTOB RUBIN, 0F STOCICHOLM, SWEDEN.

STEP-BY-STEP MECHANISM IN CALCULATING-MACHINES.

Application filed April 2, 1919.

To all Mill/0777. it may concern Be it known that I, KARL VIKTOR RUBIN, correspondent, subject of the King of Sweden, residing at Stockholm, Sweden, have invented certain new and useful Improvements in Step-by-Step Mechanisms in Calculating-Machines, of which the followin" is a specification.

Ely invention relates to improvements in stepby-step mechanisms in calculating machines of that kind, wherein a usual locking device for the movement of the sliding car riage is provided. Said locking-device consists of a member, arranged on the carriage and movable up and down in a vertical plane, said member normally engaging in a horizontal row of grooves or notches in the frame of the machines.

In these machines the locking device can be actuated by hand and, at the same time is in any known way actuated by two projections or the like, arranged on the sliding carriage, which projections also engage with a toothed bar, rack or the like.

Machines of that ty e have been described in U. S. A. Patent 0. 967,821 and in my pinding application Serial No. 223,232 filed arch 18, 1918.

My present invention is essentially characterized thereby, that each of the said projections consists of two parts, pivotally and slidably connected with each other.

An embodiment of my invention is illustrated in the accompanying drawing, wherein- Figure 1 is a front view of a part of the sliding carriage, whereby the casing is partly broken away, in normal or resting position, Fig. 2 shows the same but with the parts in that position, wherein the carriage has just been moved one step to the right, while Fig. 3 is a vertical section of Fig. 1.

Hereby in all the figures only one of the said projections is illustrated.

The casing or covering plate is indicated by the numeral 1. 3 and 8 designate the different parts of the projections, being ar ranged on both sides of the usual locking device 4, movable in a vertical plane.

11 indicates the usual toothed bar, fixed in the frame, 13 the spring of the projecting part 3 and 15 a pin or stud for limiting the movement of said part 3. 17 designates a spring, which actuates the part 8. All said parts are before known and are on account thereof not more fully described.

Specification of Letters Patent.

Patented se t. 7, 1920.

Serial No. 267,037.

According to the present invention the two parts 3 and 8, forming the projection, are pivotally as well as slidably connected with each other. This is in conformity with the illustrated embodiment attained thereby that in the part 8, provided with a tooth 22, adapted to mesh with the toothed bar 11, is arranged a slit or opening 2 in which engages a pin or stud 23, arranged on the part 3. The slit, preferably an oblong one, is hereby placed in such a direction, that the part 3 can be displaced or shifted in relation to the part 8. Said part 3 is further provided with a further pin or stud 25, running in a second oblong slit 26 on the part 8.

The function of the arrangement is as follows In shifting or displacing the carriage one step or position to the left the part 3 is actuated in the usual way. Hereby said part meshes with the locking device 4, presses the same downward, whereby the carriage is unlatched and can move toward the left side. During the shifting movement of the carriage'the member 3 is displaced to the left in relation to the part or member 8, whereby the latter member is turned downward and engages with the toothed bar 11. When the pins or studs 23, 25 have reached their other end-positions (Fig. 2), the tooth 22 has at the same time meshed the next tooth of the toothed bar and prevents the carriage from being shifted or displaced a further way (Fig. 2). As soon as the grasp about the part or member 3 ceases, the members 3 and 8 0 back into their former positions (Fig. 1 on account of the springs 13 and 17.

By means of the arrangement now described the advantage is obtained that the locking device 4 can be directly operated by means of the part or member 3. Further the arrangement is more simple and on account thereof easy to manufacture.

What I claim as new and desire to secure by Letters Patent of the United States is 1. In a step-by-step mechanism for calculating machines of the class described, in combination with a toothed bar, a carriage and a locking element pivotally mounted thereon, a pair of members to actuate said locking element, said members being pivotally mounted, one of said members being slidably engaged with the locking element, and the other member having a tooth for engagement with said toothed bar and being slidably mounted on said pivot.

2. In a step-by-step mechanism for calculating machines of the class described, in

slidably mounted on saidpivot, and means to limit the relative pivotal movement of said members.

In testimony whereof I afiix my signature in presence of two witnesses. 1*

KARL VIKTOR RUDIN.

Witnesses: 7

Esrnn EBERLUND, OLGA SVENSON. 

